quartz watch officially chronometer-certified by the COSC, mechanical, hand-wound, high-frequency (21,600 vibrations per hour), 26 jewels. 1/6th of a second chronograph, 15-minute totalizer. Pointer-type calendar. CASE Platinum, 18K yellow, rose or white gold. Resistance to 5 bars. Screw-locked crown. Rotating pinion bezel with variable tachometer (circular slide rule). Cambered sapphire crystal, glareproofed on both sides. Diameter: 49 mm. DIAL A choice of over 15 shades, taken from the range of bodywork options.